Proton-coupled electron transfer in a hydrogen-bonded charge-transfer complex

Verma, Sandeep ; Aute, Sunil ; Das, Amitava ; Ghosh, Hirendra N. (2016) Proton-coupled electron transfer in a hydrogen-bonded charge-transfer complex Journal of Physical Chemistry B, 120 (41). pp. 10780-10785. ISSN 1520-6106

Full text not available from this repository.

Official URL:

Related URL:


A proton-coupled electron transfer (PCET) reaction in a hydrogen-bonded charge-transfer (CT) complex of 4-([2,2′-bipyridin]-4-yl)phenol (bpy-phenol) with a F ion has been investigated by ultrafast time-resolved transient absorption spectroscopy. The phenolic receptor molecule, bpy-phenol, binds to the F ion through a hydrogen bond and senses the F ion via the Stokes-shifted CT band. Upon photoexcitation, CT from the phenol residue to the bpy residue promotes proton transfer from the phenol radical cation (ArOH•+) to the fluoride ion at ultrafast time scales of <150 fs (instrument response function limited) and 3 ps, separately. The fast and slow proton-transfer times are linked to two different types of hydrogen-bonding networks between the phenol residue and fluoride ion. Crystalline water in the fluoride salt hydrates mediates the proton-transfer reaction. This work demonstrates the participation of a hydrogen-bonded water bridge within a PCET reaction in a water-restricted environment.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:102187
Deposited On:25 Jan 2017 04:08
Last Modified:25 Jan 2017 04:08

Repository Staff Only: item control page